ET MALWARE Observed StealC_V2 Payload Request (GET)

alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE Observed StealC_V2 Payload Request (GET)";
    flow:established,to_server;
    http.method;
    content:"GET";
    http.uri;
    pcre:"/\x2e(?:dll|exe)$/";
    http.header_names;
    content:!"|0d 0a|referer|0d 0a|"; nocase;
    http.host;
    pcre:"/^(?:[0-9]{1,3}\.){3}[0-9]{1,3}$/";
    http.user_agent; bsize:11;
    content:"Mozilla/5.0";
    http.header;
    content:"User|2d|Agent|3a 20|Mozilla|2f|5|2e|0|0d 0a|"; fast_pattern;
    classtype:trojan-activity;
    sid:2066590; rev:1;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, tls_state TLSDecrypt, created_at 2026_01_05, deployment Perimeter, deployment SSLDecrypt, malware_family Stealc, performance_impact Moderate, confidence Medium, signature_severity Major, updated_at 2026_01_05, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1105, mitre_technique_name Ingress_Tool_Transfer;
    target:src_ip;
)